How an established UK clinic turned its clinical authority into search authority
Promis is a respected London and Kent addiction and mental-health clinic with a strong domain, but it wasn’t capturing the searches its expertise deserved. A content-led program grew organic traffic from 130 to 1,974 monthly visitors and took it to #1 for major mental-health terms, including "eupd" at around 35,000 searches a month.
Reporting period: Jan 2023 – Jun 2026. Source: Ahrefs.
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Before and after
Promis
Promis runs private addiction and mental-health treatment in London and at Promis Hay Farm in Kent, with a long clinical heritage and an already-authoritative website. The challenge was not credibility, it was capture: a trusted brand that wasn’t ranking for the high-volume mental-health and addiction questions its clinicians are expert in answering.
Authority without capture
- !A strong domain, underused. Promis already had high authority (Domain Rating 57) but ranked for few of the searches that matter.
- !High-value conditions. Mental-health terms like "eupd" carry tens of thousands of monthly searches.
- !A content gap between the clinic’s real expertise and what was published and ranking.
Convert clinical expertise into ranked, useful content
The challenge
- ×Low capture. 130 monthly visitors and just 24 page-one keywords despite a strong domain.
- ×Untapped authority. High Domain Rating that wasn’t translating into rankings.
- ×A broad clinical remit across addiction and mental-health conditions, none well covered.
The opportunity
- ✓Own condition-level searches. Terms like "eupd" and "reactive depression" were winnable and high-volume.
- ✓Leverage existing authority. A strong domain means new content can rank quickly.
- ✓Build a durable footprint on genuinely expert, clinically-grounded content.
Expert content on an authoritative domain
We mapped the conditions Promis treats to the searches people make, then published the expert content the domain’s authority could rank fast.
Audit & opportunity mapping
We audited the site and mapped its clinical expertise against the highest-volume, winnable addiction and mental-health searches.
Condition & treatment content
We published in-depth, clinically-grounded content on the conditions Promis treats, from personality disorders to depression and addiction.
Authority & internal linking
We used the domain’s existing authority and a tight internal-linking structure to push new content onto page one quickly and into the top three.
Continuous optimization
We tracked Ahrefs visibility and kept expanding the winning clusters, driving sustained growth through 2025 and into 2026.
Authority, finally captured
With the right content, the domain’s authority converted into rankings, and traffic grew more than 14x.
| Metric | Before (Jan 2023) | After (Jun 2026) | Growth |
|---|---|---|---|
| Monthly organic visitors | 130 | 1,974 | ▲ +1,418% |
| Keywords on page 1 (1–10) | 24 | 406 | ▲ +1,592% |
| Keywords in the top 3 | 8 | 142 | ▲ +1,675% |
| Monthly organic traffic value | $279 | $1,404 | ▲ +403% |
Source: Ahrefs (traffic, value, keyword positions). Total tracked keywords consolidated (638 to 585) as rankings concentrated in the top positions; Domain Rating held steady (57 to 55), confirming the growth was content-driven, not link-driven. Reporting period Jan 2023 – Jun 2026.
Monthly organic visitors, Jan 2023 → Mar 2026
The real monthly organic-traffic curve from Ahrefs, steady, sustained growth to its peak.
Ranking #1 for major mental-health terms
Promis now owns the top spot for some of the highest-volume mental-health condition searches in the UK.
A selection from 406 keywords on page one (142 in the top 3). Positions per Ahrefs, country GB. "eupd" alone carries ~35,000 monthly searches.
A condition term worth 35,000 searches a month
Ranking #1 for a major mental-health condition puts Promis in front of the exact people it can help, at the moment they search.
The top spot for a condition term with ~35,000 monthly searches, a category-defining position no ad budget could cheaply hold.
From 130 to 1,974 monthly visitors, with traffic value up more than 400% to $1,404/mo.
Growth came from content, not links (Domain Rating held flat), so it is stable and keeps compounding.
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